high7.5Known exploitedPublic exploit code
CVE-2025-30397
Microsoft Windows Scripting Engine Type Confusion Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2025-05-13. Federal due date: 2025-06-03.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- Microsoft Windows Server 2025 JScript Engine - Remote Code Execution (RCE)2025-06-05 · remote · windows
Impact
Access of resource using incompatible type ('type confusion') in Microsoft Scripting Engine allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 1507 | before 10.0.10240.21014 |
| Microsoft | Windows 10 1607 | before 10.0.14393.8066 |
| Microsoft | Windows 10 1809 | before 10.0.17763.7314 |
| Microsoft | Windows 10 21h2 | before 10.0.19044.5854 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.5854 |
| Microsoft | Windows 11 22h2 | before 10.0.22621.5335 |
| Microsoft | Windows 11 23h2 | before 10.0.22631.5335 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.3981 |
| Microsoft | Windows Server 2008 | All versions Version r2 |
| Microsoft | Windows Server 2012 | All versions Version r2 |
| Microsoft | Windows Server 2016 | before 10.0.14393.8066 |
| Microsoft | Windows Server 2019 | before 10.0.17763.7314 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-30397
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-detection-script
- https://www.vicarius.io/vsociety/posts/cve-2025-30397-type-confusion-vulnerability-in-microsoft-scripting-engine-mitigation-script
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-30397